<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>
    <script src="../../vue.js"></script>
</head>

<body>
    <div id="app">
        <p>{{add}}--{{a}}</p>
        <hr />
        <p v-html="a">{{add}}--{{a}}</p>
    </div>
    <script>
        new Vue({
            el: "#app",
            data: {
                add: "<h2> 你好 </h2>",
                a: `<h2>ni</h2>
                <h3>好</h3>`,
            },
        });
    </script>
</body>

</html>